This is a modified deck taken at base from top100 legend nzoth hunter which is out of date.
With the above deck on the latest Un'Goro patch I only could obtain rank 12, however with this deck I am rank 8. I'm sure other players will be able to best this.
A rough playing guide is to trade minions effectively in the early game with occasional spells/weapons, then relentlessly pound face. Your hero power is a good supplement when you have a taunt wall stopping you, along with Kill Command as you will normally have a beast on the board. N'Zoth, the Corruptor and Dr. Boom are there if you do get dragged into late game which often turn the game in your favour, or at least enough to pound face.
When I make decks I like them to actually be fun/interesting to play, with this deck each game is different and you have the occasional amazing game-swinging moves that I love about hearthstone!
I am aware there are some interesting choices made including the choice of secrets, Freezing Trap was left out as there are too many decks out there where it helps your opponent, eg reno, quest rogue. I also find opponents play as though it were there rather than Bear Trap so get surprised. Golakka Crawler is there because I hate pirate decks, and as a beast it is quite useful anyway. Alleycat really helps early game, it is a good value card.
Always keep in your hand Mad Scientist.